adults and children who are going to have a cut through the skin for an operation.

It does not specifically look at:

adults and children who are going to have an operation that does not involve a cut through the skin on the outside of the body

adults and children who are going to have procedures involving thintubes (called catheters) placed in blood vessels, tubes (called shunts) inserted into the body to divert fluid, thin flexible telescopes (called endoscopes) to view the inside of the body or metal pins used externally to treat broken bones.